The Fault Diagnosis and Control of the Boost Converter Switching System in Energy Conversion Systems

In this article, through using the theory of hybrid dynamical systems, the boost converter was modeled as a switching system. Then, by taking into account parameter uncertainty, input disturbance, and variable state delay in the presence of a switching with a constraint of average dwell time, the design problem of fault diagnosis along with output feedback-based control-   has been formulated as a multi-objective optimization problem. Onel2-gain performance index guarantees the robustness of the fault to disturbance; the other l2-gain performance criterion guarantees the sensitivity of the residual to fault. By adopting a switchable Lyapunov function, sufficient conditions have been obtained for fault detection along with control in terms of linear matrix inequalities. In this research, an approximate method was used; that is, an averaged state-space model of the boost converter. The simulation results showed the effectiveness of the present approach.